[Tutor] Help required to count no of lines that are until 1000 characters

[spir ☣]

On Tue, 11 May 2010 11:00:20 -0700
ramya natarajan <nramya82 at gmail.com> wrote:

> Hello,
> 
> I am very  beginner to programming, I  got task to Write a loop that reads
> each line of a file and counts the number of lines that are read until the
> total length of the lines is 1,000 characters. I have to read lines from
> files exactly upto 1000 characters.
> 
> Here is my code:
>  I created file under /tmp/new.txt  which has 100 lines and 2700 characters
> , I wrote code will read exactly 1000 characters and count lines upto those
> characters.But the problem is its reading entire line and not stopping
> excatly in 1000 characters. Can some one help what mistake i am doing here?.
> 
>    log = open('/tmp/new.txt','r')
>    lines,char = 0,0
>    for line in log.readlines():
>         while char < 1000 :
>                 for ch in line :
>                      char += len(ch)
>                 lines += 1
>   print char , lines
>   1026 , 38  ----  Its counting entire line  instead of character upto 1000
> -- can some one point out what mistake am i doing here , where its not
> stopping at 1000 . I am reading only char by car
> 
> My new.txt -- cotains content like
> this is my new number\n
> 
> Can some one please help. I spent hours and hours to find issue but i am not
> able to figure out, Any help would be greatly appreciated.
> Thank you
> Ramya

Either you read line per line, but then you cannot stop exactly at the 1000th character; or you traverse the text char per char, but this is a bit picky.
I would read line per line, and when count >= 1000, read chars inside current line to get to the 1000th, if needed.
(Your specification does not state this, but your disappointment seems to be about that issue ;-)

Denis
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